Aneurysmal bone cyst (ABC) secondary to Giant Cell Tumor of bone (GCT) is a rare lesion, of which the incidence is about 0.011 to 0.053 per 100,000 every year. There are only a few previous case reports, and most of them occur in the spine, long bones or flat bones. We report one case of a patient who complained of “progressive enlargement of the mass on right-hand fifth finger for 5 years with ulceration for 6 months”. After the imaging examination in our hospital, it was diagnosed as a “huge bone tumor on the proximal phalanx of the right-hand fifth finger”, then wide excision and amputation of the fifth finger were made. The pathological examination diagnosed the mass as aneurysmal bone cyst secondary to giant cell tumor, 13 × 8 × 6 cm3, with no local infiltration observed. No recurrence and metastasis occurred 18 months after the operation, and the patient recovered well. In this report, we discuss the etiology, diagnosis, differentiation, and management of Aneurysmal bone Cyst secondary to Giant Cell Tumor of bone, and review previous case studies.

中文翻译：

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继节指骨巨细胞瘤继发的巨大动脉瘤性骨囊肿1例及相关文献

继发于骨巨细胞瘤（GCT）的继发性动脉瘤性骨囊肿（ABC）是一种罕见的病变，每年的发病率约为每100,000例0.011至0.053。以前的病例报道很少，其中大多数发生在脊柱，长骨或扁平骨中。我们报告了一例患者抱怨“右手无名指肿块逐渐扩大持续5年，溃疡持续6个月”的病例。在我院进行影像学检查后，被诊断为“右手五指近端指骨巨大骨瘤”，然后进行了广泛的切除和截肢。病理检查诊断为肿物为继发于巨细胞瘤的动脉瘤性骨囊肿，大小为13×8×6 cm3，未见局部浸润。术后18个月无复发，转移，病人康复得很好。在本报告中，我们讨论继发于骨巨细胞瘤的继发性动脉瘤性骨囊肿的病因，诊断，分化和处理，并回顾以前的病例研究。